code: def testPickleOfArrayWeakType(self):
      x = jnp.array(4.0)
      self.assertEqual(x.aval.weak_type, True)
      s = pickle.dumps(x)
      y = pickle.loads(s)
      self.assertArraysEqual(x, y)
      self.assertIsInstance(y, type(x))
      self.assertEqual(x.aval, y.aval)
  
imports: import pickle
  import unittest
  from absl.testing import absltest
  from absl.testing import parameterized
  import jax
  from jax import numpy
  from jax import config
  from jax.interpreters import pxla
  from jax._src import test_util
  from jax._src.lib import xla_client
  import numpy
label_desc: Use image node_id 2 for calling the PickleTest obj's underlying member method code with example usage: obj.testPickleOfArrayWeakType() without return types